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Intensive care medicine · Dec 1995
Comparative Study Clinical Trial Controlled Clinical TrialSuperimposed inspiratory work of the Siemens Servo 300 ventilator during continuous positive airway pressure.
- I K Tan, S B Bhatt, Y H Tam, T A Buckley, and T E Oh.
- Department of Anaesthesia and Intensive Care, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, NT.
- Intensive Care Med. 1995 Dec 1;21(12):1023-6.
ObjectiveTo compare the superimposed inspired work of breathing (SIW) of the Siemens Servo 300 ventilator with the Siemens Servo 900 C ventilator.DesignComparisons made at continuous positive airway pressure (CPAP) levels of 0, 4, and 8 cmH2O, and at trigger sensitivities of -1 and -2 cmH2O, and flow triggering.SettingGeneral intensive care unit in a University teaching hospital.Patients7 patients receiving CPAP. At all levels of CPAP, the SIW was significantly less with the Siemens Servo 300 ventilator as compared to the Siemens Servo 900 C ventilator despite similar trigger sensitivities. No significant difference was found in the SIW of the Servo 300 ventilator when comparing trigger sensitivities of -1 cmH2O, -2 cmH2O, and flow triggering. Different levels of CPAP had no effect on SIW.ConclusionsThe Siemens Servo 300 ventilator entails less superimposed inspiratory work of breathing than the Siemens Servo 900 C ventilator.
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